125 kHz Passive RFID Device - Microchip Technology
Description
MCRF202
125 kHz Passive RFID Device with Sensor Input
Features
• External sensor input • Data polarity changes with sensor input condition • Read-only data transmission • 96- or 128-bits of factory programming user
memory (also supports 48- and 64-bit protocols) • Operates up to 400 kHz carrier frequency • Low-power operation • Modulation options:
- ASK, FSK, PSK • Data Encoding options:
- NRZ Direct, Differential Biphase Manchester Biphase
• Die, Wafer, PDIP or SOIC package option • Factory programming and device serialization
Applications
• Insect control • Industrial tagging
Reader
RF Signal
Data
External MCRF202 Sensor
Switch
Package Type
PDIP/SOIC
VA
NC
TEST
SENSOR
1 2 3 4
8 VB
7 NC 6 VSS 5 VCC
Description
The MCRF202 is a passive Radio Frequency Identification (RFID) device that provides an RF interface for reading the contents of a user memory array.
This device is specially designed to detect the logic state of an external sensor, and alters its data transmissions, based on the condition of the sensor input.
The device outputs a normal bit data stream if the sensor input has a logic ‘1’ state, but outputs an inverted data stream for a logic ‘0’ state.
In this way, the reader can monitor the state (condition) of the external sensor input by detecting whether the data from the device is a normal or inverted data stream.
The device is powered by rectifying the incoming RF carrier signal that is transmitted from the reader.
When the device develops sufficient DC voltage, it transmits the contents of its memory array by modulating the incoming RF carrier signal.
The reader is able to detect the modulation and decodes the data being transmitted.
Code length, modulation option, encoding option, and bit rate are set at the factory to fit the needs of particular applications.
The MCRF202 is available in die, wafer, PDIP and SOIC packages.
The encoding, modulation, bit rate options, and data fields are specified by the customer and programmed by Microchip...
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